CALL ME OFFICER JEON

Choi Aera's parents were killed by a group of mafia when she was 10 while taking their vacation. They were in the forest that time for a camping and he met a boy named Jeon Wonwoo, who was 12 and happens to save her from killing by the mafias. She grew up with an imaginary boyfriend without a name. What if they meet again but Wonwoo only wants a revenge for her because she was the reason why his parents were killed and his brother was taken by the mafias. What if his brother became his mortal enemy and a rival from the girl he loves the most?